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Edit File: money_helper.php

<?php

class OsMoneyHelper {

/**
	 * @param $amount
	 * @param $include_currency
	 * @param $hide_zero_decimals
	 * @return string
	 *
	 * Formats amount from database format (99999.0000) to requested format, optionally can include currency symbol and strip zero cents
	 *
	 */
	public static function format_price( $amount, $include_currency = true, $hide_zero_decimals = true ): string {
		$decimal_separator  = OsSettingsHelper::get_settings_value( 'decimal_separator', '.' );
		$thousand_separator = OsSettingsHelper::get_settings_value( 'thousand_separator', ',' );
		$decimals           = OsSettingsHelper::get_settings_value( 'number_of_decimals', '2' );
		if ( empty( $amount ) ) {
			$amount = 0;
		}
		$amount = number_format( $amount, $decimals, $decimal_separator, $thousand_separator );
		if ( $hide_zero_decimals ) {
			$zeros = '';
			switch ( $decimals ) {
				case '1':
					$zeros = '0';
					break;
				case '2':
					$zeros = '00';
					break;
				case '3':
					$zeros = '000';
					break;
				case '4':
					$zeros = '0000';
					break;
			}
			$amount = str_replace( $decimal_separator . $zeros, '', $amount );
		}
		if ( $include_currency ) {
			$amount = implode( '', array( OsSettingsHelper::get_settings_value( 'currency_symbol_before' ), $amount, OsSettingsHelper::get_settings_value( 'currency_symbol_after' ) ) );
		}
		$amount = apply_filters( 'latepoint_format_price', $amount, $include_currency, $hide_zero_decimals );
		return $amount;
	}

// formats amount to be used in input money fields
	public static function to_money_field_format( $amount ) {
		return self::format_price( (float) $amount, false, false );
	}

// amount stripped from any formatting like currency symbol, thousand separator, just numbers and decimal separator is left
	public static function convert_amount_from_money_input_to_db_format( $amount ) {
		$decimal_separator = OsSettingsHelper::get_settings_value( 'decimal_separator', '.' );
		// Ensure non-negative amount to prevent financial manipulation
		// For non-negative ^\\d, For negative ^-\\d
		$amount = preg_replace( '/[^-\\d' . $decimal_separator . ']+/', '', $amount );
		// database is using dot as a decimal separator, if latepoint is not using dot for currency input - convert it to dot to store in db
		if ( $decimal_separator != '.' ) {
			$amount = str_replace( $decimal_separator, '.', $amount );
		}
		$amount = self::pad_to_db_format( $amount );
		return $amount;
	}

public static function convert_value_from_percent_input_to_db_format( $value ) {
		$decimal_separator = OsSettingsHelper::get_settings_value( 'decimal_separator', '.' );
		$value             = preg_replace( '/[^-\\d' . $decimal_separator . ']+/', '', $value );
		// database is using dot as a decimal separator, if latepoint is not using dot for input - convert it to dot to store in db
		if ( $decimal_separator != '.' ) {
			$value = str_replace( $decimal_separator, '.', $value );
		}
		$value = self::pad_to_db_format( $value );
		return $value;
	}

public static function pad_to_db_format( $amount ): string {
		return number_format( (float) $amount, 4, '.', '' );
	}
}

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